Socket programming in Java

1. Socket server

Package Com.socket.project;import Java.io.bufferedreader;import Java.io.ioexception;import java.io.InputStream; Import Java.io.inputstreamreader;import Java.net.serversocket;import Java.net.socket;public class Service {public static void Main (string[] args) {Socket socket=null;inputstream is=null;inputstreamreader isread=null; BufferedReader red=null;try {//1. Create a server-side socket, which is serversocket, specify the bound port, and listen for this port ServerSocket server=new serversocket ( 8089); SYSTEM.OUT.PRINTLN ("Server Start monitoring ... ");//Listener port while (true) {socket=server.accept ();//Get Input stream Is=socket.getinputstream (); Isread=new InputStreamReader (IS);//Create Buffer red=new BufferedReader (isread); String Data=null;while ((Data=red.readline ())!=null) {System.out.println ("The data uploaded by the client is:" +data);}} } catch (IOException e) {e.printstacktrace ();} Finally{if (Red!=null) try {red.close ();} catch (IOException e) {//TODO auto-generated catch Blocke.printstacktrace ();} if (isread!=null) try {isread.close ();} catch (IOException e) {//TODO auto-generated catch Blocke.printstacktrace();} if (is!=null) try {is.close ();} catch (IOException e) {//TODO auto-generated catch Blocke.printstacktrace ();}}}

2, the Client

Package Com.socket.project;import Java.io.ioexception;import Java.io.outputstream;import java.io.PrintWriter; Import Java.net.socket;import Java.net.unknownhostexception;public class Socketclient {//socket client public static void Main (string[] args) {OutputStream out=null; PrintWriter Writer=null;try {//Create client socket delivery address  port socket sock=new socket ("localhost", 8089); out= Sock.getoutputstream ();//bytes Stream  writer=new printwriter (out);//convert byte stream to print stream  writer.print ("I want to tell you, I've been waiting here for You"); Writer.flush (); Close the socket output stream sock.shutdownoutput ();} catch (Unknownhostexception e) {e.printstacktrace ();} catch (IOException e) {e.printstacktrace ();} finally{//Close Stream if (writer!=null) writer.close (); if (out!=null) try {out.close ();} catch (IOException e) {//TODO Auto-generated catch Blocke.printstacktrace ();}}}

Multithreaded programming

Package Com.socket.thread;import Java.io.bufferedreader;import Java.io.ioexception;import java.io.InputStream; Import Java.io.inputstreamreader;import java.io.outputstream;import java.io.printwriter;import java.net.Socket; Import Java.net.unknownhostexception;public class Socketclient {//socket client public static void main (string[] args) { OutputStream Out=null; PrintWriter Writer=null;inputstream Input=null;inputstreamreader read=null; BufferedReader Red=null; Socket Sock=null;try {//Create client socket delivery address port sock=new socket ("localhost", 8089); Out=sock.getoutputstream ();//Byte stream write R=new PrintWriter (out);//Convert the byte stream to print stream Writer.print ("I want to tell you that I have been waiting for you Here"); Writer.flush (); Close the socket output stream sock.shutdownoutput (); Gets the information returned by the server input =sock.getinputstream ();//Gets the input stream read=new inputstreamreader (input); Red=new BufferedReader (read); String data= "";  while ((Data=red.readline ())!=null) {System.out.println ("server Reply to you:" +data); }} catch (Unknownhostexception e) {e.printstacktrace ();} catch (IOException e) {E.printstacktraCE ();} finally{//Close Stream if (writer!=null) writer.close (); if (out!=null) try {out.close ();} catch (IOException e) { E.printstacktrace ();} if (red!=null) try {red.close ();} catch (IOException e) {e.printstacktrace ();} if (read!=null) try {read.close ();} catch (IOException e) {e.printstacktrace ();} if (input!=null) try {input.close ();} catch (IOException e) {e.printstacktrace ();} if (sock!=null) try {sock.close ();} catch (IOException e) {e.printstacktrace ();}}}}

Package Com.socket.thread;import Java.io.ioexception;import Java.net.serversocket;import java.net.Socket;public Class Service {public static void main (string[] args) {//1. Create a server-side socket, which is serversocket, specify the bound port and listen for this port try { ServerSocket serversocket=new ServerSocket (8089); Socket Socket=null;while (True) {//Always monitor socket=serversocket.accept ();//Start a service Socketservicethread thread=new Socketservicethread (socket); Thread.Start ();}} catch (IOException e) {e.printstacktrace ();}}}

Package Com.socket.thread;import Java.io.bufferedreader;import Java.io.ioexception;import java.io.InputStream; Import Java.io.inputstreamreader;import java.io.outputstream;import java.io.printwriter;import java.net.Socket; public class Socketservicethread extends Thread {private socket socket=null;public socketservicethread (socket socket) { This.socket=socket;} Execution thread Operation @overridepublic void Run () {InputStream input=null;inputstreamreader red=null; BufferedReader Br=null;outputstream Out=null; PrintWriter writer=null;try {//Get input stream Input=socket.getinputstream (); red=new inputstreamreader (input);//Buffer character br=new BufferedReader (red); String data= ""; while ((Data=br.readline ())!=null) {System.out.println ("client letter said:" +data);} Close write stream socket.shutdowninput ();//Get Output stream Out=socket.getoutputstream ();//Get output byte stream writer=new PrintWriter (out);// Convert bytes to print stream Writer.write ("Welcome!! "); Writer.flush ();} catch (IOException e) {e.printstacktrace ();} Finally{if (Br!=null) try {br.close ();} catch (IOException e) {e.printstacktrace ();} if (red!=null) try {red.close ();} catch (IOException e) {e.printstacktrace ();} if (input!=null) try {input.close ();} catch (IOException e) {e.printstacktrace ();} if (writer!=null) writer.close (); if (out!=null) try {out.close ();} catch (IOException e) {//TODO auto-generated catch Blocke.printstacktrace ();}}}

Socket programming in Java